In other words, 491 miligrams is 0.0014 times the weight of a Can of Soup, and the weight of a Can of Soup is 710 times that amount.

(for Campbell''s Condensed Tomato Soup, 317.9 ml) A can of Campbell''s Tomato Soup weighs 350,000 miligrams. Cans have been used to store soup and other foods since their invention in 1913, but a dedicated can opener was not developed until cans began to use thinner materials — prior to that time, cans were usually opened using various blunt instruments and tools.

It's about one-eight-hundred-fiftieth as heavy as a Football (American).

In other words, 491 miligrams is 0.001194449332224 times the weight of a Football (American), and the weight of a Football (American) is 837.2058764 times that amount.

(a.k.a. "pigskin") (NFL standard)Per National Football League official rules, an American football must weigh between 396,893.32375 miligrams and 425,242.846875 miligrams. Because of NFL regulations, ceremonial considerations, and backup requirements, each NFL Superbowl requires the manufacture of 144 balls exclusively for the event.

In other words, 491 miligrams is 0.00078725069624 times the weight of a Basketball, and the weight of a Basketball is 1,270.2433987 times that amount.

(NBA official ball standards, Size 7)A regulation NBA basketball, manufactured by Spalding, is known as a Size 7 ball and weighs 623,689.50875 miligrams. These balls have 4,118 pebbles each with a diameter of 2.5 mm

In other words, the weight of a Poppy Seed is 0.00063 times 491 miligrams.

(Papaver somniferum)Fifty percent oil by weight, a poppy seed weighs approximately 0.3 mg. The true pigment of a poppy seed is brown in color, while the characteristic bluish color is an optical illusion caused by a layer of calcium oxalate crystals refracting light rays.